When two or more numbers each have one or more of the same factors, these factors are called common factors. A single number does not have common factors.
The greatest common factor (GCF) is 64.
The GCF of 280 and 320 is 40
The GCF of 320 and 840 is 40.
20
Since 20 is a factor of 320, it is automatically the GCF.
5
Since 40 is a factor of 320, it is automatically the GCF.
The GCF is 10.
The GCF is 16.
The GCF is 5.
The GCF is 320.
The GCF is 64.